D-type power amplifying method
A power amplification and signal modulation technology, which is applied to amplifiers, amplifiers with semiconductor devices/discharge tubes, electrical components, etc., can solve the problem that digital signals cannot be amplified by Class D power
Active Publication Date: 2012-12-19
SHANGHAI BEILING
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[0005] The purpose of the present invention is to overcome the deficiencies of the prior art and provide a method for amplifying the class D power of digital received signals, which can solve the technical problem that digital signals cannot be amplified normally for class D power
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[0023] see Figure 2 to Figure 4 In order to better understand the technical solution of the present invention, the inventors of the present invention will describe in detail below through specific embodiments in conjunction with the accompanying drawings:
[0024] see figure 2 , a kind of D class power amplification method of the present invention comprises the following steps:
[0025] Step 100 of level shifting: level-shifting the digital input signal input from the outside to generate a first amplitude modulation signal and a second amplitude modulation signal that are opposite to each other;
[0026] Step of analog filtering 200: performing first analog filtering 201 and second analog filtering 202 on the first amplitude modulation signal and the second amplitude modulation signal in parallel to generate the first analog signal and the second analog signal which are opposite to each other.
[0027] Integrate 300 step: perform first integration 301 and second integratio...
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The invention discloses a D-type power amplifying method which is used in the field of integrated circuits. The D-type power amplifying method comprises the following steps: an electric level displacement step: carrying out electric level displacement on an externally input digital to generate a first amplitude-modulated signal and a second amplitude-modulated signal which are mutually reverse in phase; an analog filtering step: synchronously carrying out first analog filtering and second analog filtering on the first amplitude-modulated signal and the second amplitude-modulated signal to generate a first analog signal and a second analog signal which are mutually reverse in phase; and an integration step, a comparing step and an amplifying step, finally generating a first driving signal and a second driving signal which are mutually reverse in phase, and the power supply amplitudes of the first driving signal and the second driving signal are sufficient to drive the load on a D-type power amplifier chip. The technical effect of the D-type power amplifying method is as follows: the technical problem that the digital signal cannot normally carry out D-type power amplifying is solved.
Description
technical field [0001] The invention relates to a class D power amplification method used in the field of integrated circuits. Background technique [0002] Audio power Class D power amplification is widely used in electronic systems such as home theaters, audio systems, stereo players, and servo amplifiers. In recent years, Class D power amplification has been used more and more in various electronic systems, especially in portable devices such as mobile phones. [0003] see figure 1 .At present, the commonly used class D power amplification method includes the following steps: integration step 300': performing the first integration 301' and the second integration 300' in parallel on the input signal input from the outside world, to generate the first integration signal of opposite phase and the second integral signal; the first integral signal and the second integral signal are mutually inverse; comparison step 400': compare the first power supply amplitude with the firs...
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IPC IPC(8): H03F3/217
Inventor 张红波
Owner SHANGHAI BEILING